How do you resize a photobucket video?

Most good video editors can do this. So long as the file is not protected by some sort of DRM. The file type has an impact on this as well. MPGs, being open and not proprietary to any company, have the best chance of decent programs for this. MOV and FLV the least. Find your file format and do a search with that as one of the search terms in google along with "video resize program".